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What may happen when extra water vapour is added to saturated air?

Answer and explanation

Correct answer: Condensation may occur

Direct answer: A, condensation may occur. Saturated air is already holding approximately the maximum water vapour possible at its current temperature. If extra vapour is added, or if the air cools, the air cannot keep all the moisture in gaseous form. Some water vapour can therefore condense into tiny liquid droplets or, under sufficiently cold conditions, ice crystals. A is correct and uses may because condensation depends on conditions such as temperature and available surfaces or particles. B is wrong because the key result is not that evaporation must continue; evaporation and condensation can occur together, but excess moisture favours condensation. C is the opposite of what happens. D is an unjustified absolute statement: adding vapour does not always make temperature zero. Memory cue: saturated air is like a full container; extra water must leave the vapour form or conditions must change.

Related tags

GeographySaturationCondensationWater VapourHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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